Abstract
We retrospectively collected data on patient age, exposure factors, and compressed breast thickness (CBT) from 7,566 mammograms, which were obtained in the medio-lateral oblique projection over a 1-year period. The mean CBT was 31.7 mm, and was <30 mm in 44.8 % of cases. In 93.1 % of the mammograms with CBT 20-29 mm, tube voltage was 24 kV. In 196 mammograms exposed at 24 kV, the CBT was 29 mm and a maximum mAs value was over than 270 mAs. In order to evaluate the dose reduction, the tube loading was measured, using the semi-automatic AEC mode, for the mammography phantoms with a thickness of 10 to 30 mm while varying the tube voltage from 24 to 27 kV. The tube loading at 27 kV was approximately 50 % lower than that at 24 kV, the average glandular dose calculated could be reduced by about 20 %.
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© 2016 Springer International Publishing Switzerland
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Nishide, H., Ohta, K., Murata, K., Kodera, Y. (2016). Exposure Conditions According to Breast Thickness and Glandularity in Japanese Women. In: Tingberg, A., Lång, K., Timberg, P. (eds) Breast Imaging. IWDM 2016. Lecture Notes in Computer Science(), vol 9699. Springer, Cham. https://doi.org/10.1007/978-3-319-41546-8_51
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DOI: https://doi.org/10.1007/978-3-319-41546-8_51
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